CN2751180Y

CN2751180Y - Planet differential worm device with stepless speed regulating, soft starting and moment limiting functions

Info

Publication number: CN2751180Y
Application number: CN 200420068455
Authority: CN
Inventors: 龚晓和; 梁轶
Original assignee: 李本平
Priority date: 2004-08-19
Filing date: 2004-08-19
Publication date: 2006-01-11
Anticipated expiration: 2014-08-19

Abstract

The utility model relates to a planet differential worm device with the functions of stepless speed regulation, soft starting and moment limitation, which is formed by the connection of a machine frame, a main motor, a shaft joint, a sun wheel, an external gear shaft, a top block, a top end, a planet wheel frame, a planet wheel shaft, a planet wheel member, a clamping plate, an external gear connector, an internal gear, a semicircular clamping ring, an output shaft, a retarding mechanism, a worm wheel, a worm, an external spline shaft, disk springs, a baffle plate, a sleeve barrel, a gland bush, an adjustment gland bush, a detent, a sleeve pipe, a speed regulating motor, a conduction baffle plate, a two-way displacement sensor, a rolling bearing, etc. When the utility model is used, the output shaft which is used as an output member is connected with working parts of a lifter and a transveyer which are of large and medium power, and then, the signal output end of the two-way displacement sensor is connected with a control circuit of the main motor by the conducting wires. The utility model integrates the functions of stepless speed regulation, flexible starting and output overload moment limitation protection, has the advantages of high transmission efficiency, low noise, compact structure and reliable performance, especially realizes that the starting currents of the main motor are lower than rated currents, and avoids the impact of the system of the utility model to an electric network.

Description

Planetary differential worm screw stepless speed regulation soft start torque limiting device

Technical field

The utility model relates to a kind of device that is used for carrying out on the equipment such as big-and-middle-sized lift, conveyor speed governing, soft start and the protection of overload limit square, specifically, relates to a kind of planetary differential worm screw stepless speed regulation soft start torque limiting device.

Background technique

At present domestic that equipment such as big-and-middle-sized lift, conveyor are carried out the mode and the device of speed governing is a lot, such as frequency control of motor speed, power transformation resistance speed governing, friction speed-regulating, Hydraulic Adjustable Speed etc.Generally all be to adopt main motor speed of control or torque differences to reach the purpose of two-way stepless speed regulation on electrical equipment control, and can guarantee seamlessly transitting of machine driven system.But for main motor, owing to start the influence of stall square inertia, cause inrush current to form impact greater than rated current to electrical network, therefore necessarily require big-and-middle-sized power motor No Load Start electric current to realize soft start less than rated current, so also just become various modes of speed regulation and all necessary primary difficult problem that solves of device.Though existing RHVC has realized soft start, yet powerful frequency-variable controller price is very expensive, and circuit wherein and electronic parts and components repair difficulty, the maintenance cost height; Though power transformation resistance speed governing also can realize soft start, shortcoming is that power consumption is big, and the big more then user cost of power is high more, and control system is also complicated more, and it is just big more to take up room, and can not solve explosion-proof problem; Friction speed-regulating only is applicable to small-power, and when using when high-power, friction catch moment is big, and the frictional heating problem can't solve, so the friction speed-regulating mode is for big-and-middle-sized power master motor, and soft start is far from being; As for existing Hydraulic Adjustable Speed, though can realize soft start, shortcoming is that equipment easily leaks, noise is big, temperature is high, environment is had pollution, is that service behaviour is not good generally speaking.

In addition, a lot of arrangements for speed regulation all must solve a problem of limitting square to protect to output overloading, and prior art normally adopts fluid coupling to realize.But problem is that fluid coupling itself is bulky, and power loss is big, the internal structure complexity, and particularly after the fusible plug fusing, high-temperature oil liquid sprays at a high speed, may jeopardize equipment and personal safety.

Take a broad view of existing above-mentioned various arrangements for speed regulation as seen, a kind of arrangements for speed regulation both can have been accomplished keeping in the constant absence of main motor speed, realized the two-way stepless speed regulation of output speed and seamlessly transitted; Can make big-and-middle-sized power master electric motor starting electric current realize soft start less than rated current again; Also possesses output overloading limit square protective function simultaneously; And can also accomplish that simple in structure, reliable working performance, manufacturing and working service cost are lower etc.

Summary of the invention

For solve that existing big-and-middle-sized arrangements for speed regulation exist above-mentionedly can not realize simultaneously that two-way stepless speed regulation seamlessly transits, soft start and output overloading limit square protective function and not good, manufacturing of complex structure, service behaviour and working service cost problem of higher again; the purpose of this utility model, be provide a kind of and can realize simultaneously that two-way stepless speed regulation seamlessly transits, soft start and output overloading limit square protective function and simple in structure again, reliable working performance, manufacturing and the lower-cost planetary differential worm screw of working service stepless speed regulation soft start torque limiting device.

Solution of the present utility model is as follows.It still includes frame, main motor and the shaft joint that is connected on the main machine shaft, and its feature part structurally is, one external tooth wheel shaft and sun gear is housed in frame, the external tooth wheel shaft connects sun gear with its external tooth teeth directional internal tooth floats to constitute backlash, one end of external tooth wheel shaft is fixed on the frame by rolling bearing and stretches out outside the frame and links to each other with shaft joint, the other end is fixed in the hole of a planet carrier by rolling bearing, be fixed with jacking block and top respectively in gear shaft and the planet carrier hole outside, apical grafting is to carry out both axially locating mutually with the top for jacking block, and an end of planet carrier is fixed on the frame with rolling bearing; On planet carrier, one week respectively be fixed with the planetary wheel component that quantity is at least two groups by planet wheel shaft around circle, every group of planetary wheel component is made of a planet wheel and the rolling bearing and the back-up ring that are positioned at two ends, planet wheel hole, rolling bearing and back-up ring then are fixed on the corresponding planet wheel shaft, each planet wheel all with the sun gear outer gearing, the outer end of each planet wheel shaft offers a Card trough and has a clamp to be stuck in the groove, then this clamp is connected mutually with an end of planet carrier, so that planet wheel shaft is radially reached axially locating; Has an external gear connector that is positioned at frame, the other end of planet carrier is fixed in the hole of external gear connector one end with rolling bearing, the outer increment of external gear connector and an internal gear teeth directional mutually connect that backlash floats to constitute radially, two half-round clamping rings snap in the grooving that external gear connector end circumference radially offers, and the end face of two semicircle snap rings is fixed in an end of internal gear to carry out axially locating, internal gear and all interior mutually engagement of the planet wheel of every group of planetary wheel component, in frame, have one and adopt bearing to be contained on the frame and stretch out output shaft outside the frame, between the external gear connector the other end and output shaft, be connected with the reducing gear that quantity is at least the different transmission types of one-level; Having one is positioned at frame and is fixed in worm gear on the planet carrier, one worm screw and the outer gearing mutually of this worm gear, worm screw is connected with a male splined shaft by internal spline, the two ends of male splined shaft use roller bearings respectively in frame, on end of worm screw and the male splined shaft between one of them rolling bearing belleville spring and baffle plate are housed, the rolling bearing outer end of this end is crimped with successively and is enclosed within the sleeve that male splined shaft is outer and the frame perforate is interior, bearing and gland, and gland is fixed on the frame, stretch out and be connected with a coupling drive that has a Brake drum on the outer male splined shaft of this gland perforate, coupling drive a break radially is housed, this coupling drive is connected with a speed-adjustable motor, belleville spring and conduction baffle plate are housed on the male splined shaft between the other end of worm screw and another rolling bearing, the rolling bearing outer end of this end is crimped with the sleeve that is enclosed within the frame perforate successively and adjusts gland, and adjusting gland is fixed on the frame, in the male splined shaft of this end, offer porose and be built-in with a two-way displacement transducer in the hole, the conduction baffle plate is withstood in the inner of this bidirectional displacement sensor, and its outer end is then passed the perforate on sleeve inner and the adjustment gland and is emerging in outside the end face of adjusting gland.

The utility model with said structure is when installing and using, the lift of big-and-middle-sized power, the workpiece of conveyor should be connected with the output shaft of the utility model as output block, and the displacement sensor signal output part on the bidirectional displacement sensor is wired in the external control circuit of main motor, just can carry out work then.

During work, when speed-adjustable motor slow start (break on the coupling drive moves back simultaneously apart from opening a sluice gate at this moment), the planet carrier that worm screw output drives in the differential attachment that worm gear connected rotates, and makes the sun gear rotation through planet wheel, drives main motor by the external tooth wheel shaft again and rotates.When speed-adjustable motor accelerates to the control rotating speed gradually, main motor accelerates to rated speed thereupon, realized that speedup seamlessly transits, the stall square inertia when having overcome main electric motor starting adopts this conversion soft Starting Technology to realize the soft start of mechanical transmission and main motor.When main motor reached rated speed, it was connected power supply automatically, and speed-adjustable motor and main rotating speed of motor are balance basically.Main motor is turning under the constant situation former road to return output, drives sun gear as input, and the rotary state that this has just formed a kind of two input speed difference balances interflow makes the differential idle running of planet carrier, and the external gear connector is output as zero.Utilize the characteristic of worm drive energy self-locking, the rotating speed of speed-adjustable motor is decelerated to zero gradually, break on speed-adjustable motor and the coupling drive is cut off the power supply simultaneously automatically at this moment, the break braking makes differential rotating speed decelerate to zero gradually, while external gear connector drive quantity is at least the reducing gear of one-level and exports through output shaft, speedup has realized that to rated speed output is seamlessly transitted by zero acceleration to rated speed gradually.When output shaft output reaches rated speed and needs to slow down later on, then can manually boot speed-adjustable motor, and allow its rotating speed by accelerating slowly, speedup is to the control rotating speed gradually, and output shaft output then decelerates to zero gradually by rated speed, and is smooth deceleration.So just, realized output shaft by zero to rated speed and by rated speed to the zero two-way stepless speed regulation of acceleration, deceleration.

Limit square function in the utility model planetary differential worm screw stepless speed regulation soft start torque limiting device is achieved like this; promptly when the output shaft output overloading; the reaction force of overload torque power is at least the reducing gear of one-level by quantity; the external gear connector; internal gear makes the circumference torque force of differential planetary frame increase; worm gear through being fixed on the planet carrier is passed to worm screw; the axial force of worm screw is increased and displacement; compress belleville spring and make the displacement of conduction baffle plate; so touch bidirectional displacement sensor displacement and send signal; winner's motor is shut down, thereby realized the purpose of overload limit square.

The utility model is a kind of device that big-and-middle-sized power ascension machine, anti-explosion hoisting machine, scraper conveyor, Belt Conveyors, coal winning machine etc. need speed governing soft start and overload protection function that solves, and is equally applicable to other place of speed governing soft start.

The utlity model has following useful effect: 1. stepless speed regulation, conversion soft start and output overloading limit square protective function being melted into a whole, is a kind of transmission device of multifunctional all; 2. adopt internal gear and sun gear to float simultaneously, transmission efficiency height, noise are little, compact structure, reliable performance; 3. adopt two-way controlled stepless speed regulation, can be operated on the speed of any setting; 4. regulate and control powerful main motor and realize transforming soft start with low power speed-adjustable motor, not only can alleviate the startup impact that transmission system itself is subjected to significantly, prolong the working life of key components and parts, simultaneously can also realize that main empty load of motor inrush current is less than rated current, to the impact of electrical network, reduce the unnecessary equipment investment of power supply facilities when avoiding system start-up; 5. be provided with the overload torque limiting device, realized the output overloading limiting protecting, guaranteed safe operation, can obtain good social benefit.

Description of drawings

Fig. 1 is the forward sectional view of a kind of concrete structure of the utility model;

Fig. 2 and Fig. 3 are respectively A-A and the B-B sectional view of Fig. 1.

Embodiment

Referring to Fig. 1 to Fig. 3.The utility model includes frame 21, main motor 1 and the shaft joint 2 that is connected in main motor 1 rotating shaft, external tooth wheel shaft 6 and sun gear 8 are housed in frame 21, external tooth wheel shaft 6 connects sun gear 8 with its external tooth teeth directional internal tooth floats to constitute backlash, one end of external tooth wheel shaft 6 is fixed on the frame 21 by rolling bearing 3 and stretches out outside the frame 21 and links to each other with shaft joint 2, the other end is fixed in the hole of a planet carrier 27 by rolling bearing 16, be fixed with jacking block 24 and top 25 outside in gear shaft 6 and planet carrier 27 holes respectively, apical grafting is to carry out both axially locating mutually with top 25 for jacking block 24, and an end of planet carrier 27 is fixed on the frame 21 with rolling bearing 4; On planet carrier 27, one week respectively be fixed with three groups of planetary wheel components by planet wheel shaft 15 around circle, every group of planetary wheel component is made of planet wheel 12 and the rolling bearing 9 and the back-up ring 10 that are positioned at two ends, planet wheel 12 hole, 10 of rolling bearing 9 and back-up rings are fixed on the corresponding planet wheel shaft 15, each planet wheel 12 all with sun gear 8 outer gearings, the outer end of each planet wheel shaft 15 offers a Card trough and has a clamp 13 to be stuck in the groove, clamp 13 usefulness bolts 14 are connected mutually with an end of planet carrier 27, so that planet wheel shaft 15 is radially reached axially locating; Has an external gear connector 26 that is positioned at frame 21, the other end of planet carrier 27 is fixed in the hole of external gear connector 26 1 ends with rolling bearing 22, the outer increment of external gear connector 26 and internal gear 11 teeth directional mutually connect that backlash floats to constitute radially, two half-round clamping rings 28 snap in the grooving that external gear connector 26 end circumference radially offer, and the end face of two semicircle snap rings 28 is fixed in an end of internal gear 11 to carry out axially locating with bolt 29, internal gear 11 and all interior mutually engagement of the planet wheel 12 of three groups of planetary wheel components, in frame 21, have and adopt bearing 18 to be contained on the frame 21 and stretch out output shaft 20 outside the frame 21, between external gear connector 26 the other ends and output shaft 20, be connected with the reducing gear that quantity is at least the different transmission types of one-level; Having one is positioned at frame 21 usefulness bolts 5 and is fixed in worm gear 7 on the planet carrier 27, one worm screw 38 and this worm gear 7 outer gearing mutually, worm screw 38 is connected with a male splined shaft 40 by internal spline, rolling bearing 41 is used at male splined shaft 40 two ends respectively, 44 are supported in the frame 21, on end of worm screw 38 and the male splined shaft 40 between the rolling bearing 41 belleville spring 36 and baffle plate 39 are housed, the outer end of rolling bearing 41 is crimped with successively and is enclosed within outside the male splined shaft 40 and the sleeve 46 in frame 21 perforates, bearing 45 and gland 47, and gland 47 usefulness bolts 48 are fixed on the frame 21, stretch out the coupling drive 42 that is connected with band brake wheel on the outer male splined shaft 40 of gland 47 perforates, coupling drive 42 radially is equipped with a break 30, coupling drive 42 is connected with a speed-adjustable motor 31, belleville spring 43 and conduction baffle plate 37 are housed on the male splined shaft 40 between the other end of worm screw 38 and the bearing 44, the outer end of rolling bearing 44 is crimped with the sleeve 35 that is enclosed within frame 21 perforates successively and adjusts gland 34, and adjusting gland 34 usefulness bolts 32 is fixed on the frame 21, in the male splined shaft 40 of this end, offer porose and be built-in with a two-way displacement transducer 33 in the hole, conduction baffle plate 37 is withstood in the inner of this bidirectional displacement sensor 33, and its outer end is passed the perforate on sleeve 35 inside and the adjustment gland 34 and is emerging in outside the end face of adjusting gland 34.Speed-adjustable motor 31 can adopt commercial YSP serial motors, and bidirectional displacement sensor 33 can adopt commercial PMI series sensor.

Referring to Fig. 1.Before addressed between external gear connector 26 and output shaft 20, be connected with the reducing gear that quantity is at least the different transmission types of one-level, embodiment's quantity is one-level in the drawings, and this first class reducer structure is the planetary reducer 17 (this is prior art) that comprises that external gear connector 171, internal gear 172, planet carrier 173, quantity are at least two groups planet wheel shaft 174 and planetary wheel component 175 etc. and connect and compose.These planetary reducer 17 external annexations are, its planet carrier 173 is made with output shaft 20 and is linked into an integrated entity, its external gear connector 171 usefulness bolts 19 are fixed on the frame 21, before the external gear connector addressed 26 bearing 23 that adopts quantity to be at least one be fixed in the perforate of external gear connector 171 of this planetary reducer 17, and an end of the preceding external gear connector of addressing 26 be processed into sun gear 261 and with the planet wheel outer gearing mutually of every group of planetary wheel component 175 of this planetary reducer 17.

Referring to Fig. 2 and Fig. 3.Embodiment makes two-part with frame 21 among the figure, is connected with bolt 49 between them.

Claims

1, a kind of planetary differential worm screw stepless speed regulation soft start torque limiting device includes frame, main motor and is connected shaft joint on the main machine shaft, it is characterized in that:

A) an external tooth wheel shaft and a sun gear is housed in frame, the external tooth wheel shaft connects sun gear with its external tooth teeth directional internal tooth floats to constitute backlash, one end of external tooth wheel shaft is fixed on the frame by rolling bearing and stretches out outside the frame and links to each other with shaft joint, the other end is fixed in the hole of a planet carrier by rolling bearing, be fixed with jacking block and top respectively in gear shaft and the planet carrier hole outside, apical grafting is to carry out both axially locating mutually with the top for jacking block, and an end of planet carrier is fixed on the frame with rolling bearing;

B) on planet carrier, one week respectively be fixed with the planetary wheel component that quantity is at least two groups by planet wheel shaft around circle, every group of planetary wheel component is made of a planet wheel and the rolling bearing and the back-up ring that are positioned at two ends, planet wheel hole, rolling bearing and back-up ring then are fixed on the corresponding planet wheel shaft, each planet wheel all with the sun gear outer gearing, the outer end of each planet wheel shaft offers a Card trough and has a clamp to be stuck in the groove, then this clamp is connected mutually with an end of planet carrier, so that planet wheel shaft is radially reached axially locating;

C) has an external gear connector that is positioned at frame, the other end of planet carrier is fixed in the hole of external gear connector one end with rolling bearing, the outer increment of external gear connector and an internal gear teeth directional mutually connect that backlash floats to constitute radially, two half-round clamping rings snap in the grooving that external gear connector end circumference radially offers, and the end face of two semicircle snap rings is fixed in an end of internal gear to carry out axially locating, internal gear and all interior mutually engagement of the planet wheel of every group of planetary wheel component, in frame, have one and adopt bearing to be contained on the frame and stretch out output shaft outside the frame, between the external gear connector the other end and output shaft, be connected with the reducing gear that quantity is at least the different transmission types of one-level;

D) having one is positioned at frame and is fixed in worm gear on the planet carrier, one worm screw and the outer gearing mutually of this worm gear, worm screw is connected with a male splined shaft by internal spline, the two ends of male splined shaft use roller bearings respectively in frame, on end of worm screw and the male splined shaft between one of them rolling bearing belleville spring and baffle plate are housed, the rolling bearing outer end of this end is crimped with successively and is enclosed within the sleeve that male splined shaft is outer and the frame perforate is interior, bearing and gland, and gland is fixed on the frame, stretch out and be connected with a coupling drive that has a Brake drum on the outer male splined shaft of this gland perforate, coupling drive a break radially is housed, this coupling drive is connected with a speed-adjustable motor, belleville spring and conduction baffle plate are housed on the male splined shaft between the other end of worm screw and another rolling bearing, the rolling bearing outer end of this end is crimped with the sleeve that is enclosed within the frame perforate successively and adjusts gland, and adjusting gland is fixed on the frame, in the male splined shaft of this end, offer porose and be built-in with a two-way displacement transducer in the hole, the conduction baffle plate is withstood in the inner of this bidirectional displacement sensor, and its outer end is then passed the perforate on sleeve inner and the adjustment gland and is emerging in outside the end face of adjusting gland.

2, planetary differential worm screw stepless speed regulation soft start torque limiting device according to claim 1, it is characterized in that, the quantity of the described reducing gear that is connected between external gear connector and output shaft is one-level, and this first class reducer structure is for comprising the external gear connector, internal gear, planet carrier, quantity is at least the planetary reducer that two groups planet wheel shaft and planetary wheel component etc. connect and compose, the external annexation of this planetary reducer is, its planet carrier and output shaft are made and are linked into an integrated entity, its external gear connector is fixed by bolts on the frame, before the external gear connector addressed adopt quantity to be at least one bearing fixing in the perforate of the external gear connector of this planetary reducer, and an end of the preceding external gear connector of addressing be processed into sun gear and with the planet wheel outer gearing mutually of every group of planetary wheel component of this planetary reducer.

3, planetary differential worm screw stepless speed regulation soft start torque limiting device according to claim 1 is characterized in that, is three groups by the quantity of the fixing planetary wheel component of planet wheel shaft respectively around one week of circle on the planet carrier fixed of gear shaft outside.